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in Norse mythology, stepson of King Giuki, and, in some accounts, murderer of the hero Sigurd.

According to the Icelandic ‘Poetic Edda’ and ‘Prose Edda’, Guttorm treacherously slew the hero Sigurd at the instigation of Brynhild. After an argument with Sigurd’s wife Gudrun, Brynhild realized that she had been tricked by Sigurd into marrying Gunnar. Brynhild did not know that Sigurd had been given a potion to forget that they had loved each other. In…

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